Clamping means for an articlesupporting boom

Claim 1

CLAMPING MEANS FOR ADJUSTABLY ATTACHING AN ARTICLESUPPORTING BOOM TO A SUPPORTING MEANS WHEREIN: (A) SAID BOOM AND A CLAMPING ASSEMBLY OF SAID CLAMPING MEANS MAY BE ANGULARLY ADJUSTED AS A UNIT WITH RESPECT TO SAID SUPPORTING MEANS, (B) SAID BOOM MAY BE ADJUSTED IN A DIRECTION LONGITUDINAL THEREOF WITH RESPECT TO SAID CLAMPING ASSEMBLY WHILE THE LATTER IS SECURED TO SAID SUPPORTING MEANS, (C) SAID CLAMPING ASSEMBLY AND SAID BOOM MAY BE REMOVABLY SECURED TO SAID SUPPORTING MEANS, AND (D) ALL THE ADJUSTMENTS AFORESAID AND THE SECURING OF SAID CLAMPING ASSEMBLY TO SAID SUPPORTING MEANS ARE LOCKED AND CONTROLLED BY A SINGLE MANUALLY OPERABLE MEANS; SAID CLAMPING MEANS COMPRISING: (1) A STUD MEMBER HAVING AN END PORTION FORMED AS A SURFACE OF REVOLUTION AND HAVING A THREADED PORTION, (2) A THUMBSCREW MEMBER HAVING A THREADED PORTION COMPLEMENTARY TO AND ARRANGED TO BE SCREWED TO SAID THREADED PORTION OF SAID STUD MEMBER, SAID THUMBSCREW MEMBER CONSTITUTING SAID SINGLE MANUALLY OPERABLE MEANS, (3) MEANS INCLUDING SAID STUD MEMBER AND SAID THUMBSCREW MEMBER FOR GRASPINGLY ENGAGING A PORTION OF SAID BOOM SO AS TO HOLD IT RIGID WHEN SAID THUMBSCREW MEMBER IS SCREWED TIGHT WITH RESPECT TO SAID STUD MEMBER, SAID MEMBERS AND MEANS (1), (2) AND (3) COLLECTIVELY CONSTITUTING SAID CLAMPING ASSEMBLY, (4) A SUBSTANTIALY U-SHAPED BRACKER FIXED TO SAID SUPPORTING MEANS IN WHICH SAID END PORTION OF SAID STUD MEMBER IS REMOVABLY ENGAGED IN THE OPERATIVE POSITION OF THE APPARATUS, THE THREADED CONNECTION BETWEEN SAID STUD MEMBER AND SAID THUMBSCREW